Question

Name Two kinds of surface which do not reflect sound!​

Answer 1

Explanation:

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:- Loose materials such as curtain and fibre do not reflect sound⭐

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Answer 2

Thermocol and glassfibre.

One of the most common materials used to absorb sound is fiberglass. Closed-cell spray foam, on the other hand, acts as a good thermal insulator, but is a very poor acoustical absorber. Just as not all materials are porous enough to absorb sound, not all materials absorb sound in the same way.